from flask_wtf import FlaskForm
from wtforms import StringField, PasswordField, BooleanField, SubmitField
from wtforms.validators import DataRequired, Length, Email, Regexp, EqualTo
from wtforms import ValidationError
from ..models import User


class LoginForm(FlaskForm):
    email = StringField('邮件', validators=[DataRequired(), Length(1, 64),
                                          Email()])
    password = PasswordField('密码', validators=[DataRequired()])
    remember_me = BooleanField('保持登录')
    submit = SubmitField('登录')


class RegistrationForm(FlaskForm):

    email = StringField('邮箱', validators=[DataRequired(), Length(1, 64),
                                          Email()])
    username = StringField('用户名', validators=[
        DataRequired(), Length(1, 64), Regexp('^[A-Za-z][A-Za-z0-9_.]*$', 0,
                                              'Usernames must have only letters, '
                                              'numbers, dots or underscores')])
    password = PasswordField('密码', validators=[DataRequired()])
    password2 = PasswordField(
        '确认密码', validators=[
            DataRequired(), EqualTo(
                'password', message='密码不匹配.')])
    submit = SubmitField('注册')

    def validate_email(self, field):
        if User.query.filter_by(email=field.data).first():
            raise ValidationError('邮箱已经存在.')

    def validate_username(self, field):
        if User.query.filter_by(username=field.data).first():
            raise ValidationError('用户名已经使用.')
